Gcu 477 Troubleshooting - Garmin G1000 Nxi System Maintenance Manual

GCU 477 Troubleshooting

GCU 477 Alerts and Problems
Failure Message
GCU CNFG – GCU Config error.
Config service req'd.
GCU FAIL – GCU is inoperative.
MANIFEST – GCU software
mismatch. Communication halted.
G1000 NXi System Maintenance Manual
King Air 300 Series
190-00716-N1
Cause
The G1000 has detected a
GCU 477 configuration
mismatch.
The G1000 has detected a
failure in the GCU 477.
The system has detected an
incorrect software version
loaded in GCU 477.
Solutions
•
Load GCU configuration files.
•
Replace GCU.
•
If problem persists, replace master
configuration module, check config
module wiring for faults and replace
if necessary.
NOTE
New Terrain/Obstacle cards,
Jeppesen Aviation Database and
other optional features (i.e. TAWS
unlock card) will need to be replaced
if the master configuration module is
changed. The G1000 System ID
number will change to a new number
when installing a new master config
module. The old Terrain and other
databases will no longer work as
they will remain locked to the old
System ID number.
•
Check wiring for faults (ref Failed
Path troubleshooting section).
•
Replace the GCU 477.
•
Return unit to an Authorized Repair
Facility for service
Load the correct software version.
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